Axis
Germany and Italy became allies in 1937 and extended this alliance to Japan in 1939, creating what was known as the Axis Powers.
Ally
Romania was an ally of Germany.Romania was an ally of Germany.
The Austro/Hungarian Empire was Germany's ally in WW1
Yes, Japan was by far Germany's most important ally in World War 2.
Germany was a part of the Axis Powers (or Nations) during World War II. Italy and Japan were also associated with the Axis powers, though not necessary in direct alliance with Germany itself. Their common enemy, the Allied Powers, were what united them.
Emperor Hirohito was the leader of Japan during WW2, they were part of the "axis" powers and had pact with Germany (as an ally)
Germany
In the WW2 Romania was an ally of Germany between 22.06.1941 and 23.08.1944.
He was the president of the United States, which was the strongest ally. So, he was an Ally.
Austria-Hungary was not a particularly useful ally from Germany's point of view.
Germany was a member of the Axis, and so an enemy of the Allies during World War 1 and World War 2. Today, Germany is the most powerful nation in Europe, a founding member of the European Union, and a strong ally of the US.